Backing for plastering



; INVEN TEFL- Patented Dec. 13, 1887 -J L. CLARKE.

BACKING FOR P-LASI'ERING.'

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(No Model.)

N4 PETERS. Pmwuun n hnr. Washington. D. C.

- specification.

UNITED STATES PATENT OFFICE.

J OHN' LYLE CLARKE, OF BALTIMORE, MARYLAND.

BACKING FOR PLASTERlNG.

SPECIFICATION forming part of Letters Patent No. 374,826, dated December 13, 1887.

I Application filed May 11, 1887. Serial No. 937,832. (No model.)

To all whom it TIMI/y concern-.-

Be it known that I, JOHN LYLE CLARKE, of the city of Baltimore and State of Maryland, have invented certain Improvements in Backing for Plastering, of which the following is a The object of this invention is to produce a firm backing or support for plaster; and it consists of wood boards or planks having rough surfaces provided with holes which are of.

greater diameter in theinterior of the board than at the surfaces, as will hereinafter fully appear.

In the further description of the said invention reference is made to the accompanying drawings, forming a part hereof, and in which- I Figure I is a side view of a series of studs to which my improved perforated boards are attached. Figs. II, III, IV, and V are enlarged views of a part of one of the perforated boards,showing different-shaped holes therein, and hereinafter specifically described.

Similar letters of reference indicate similar parts in all the views.

In the said drawings, A represents the studs, to which the perforated boards B are attached by means of nails a. The holes in the boards B are denoted by C. These holes are of a larger diameter in the interior of the board than at the outsides or surfaces of the same, and the shape of the holes can be modified in a great variety of ways, as shown in the various figures of the drawings.

In Fig. II the sides of the holes, as shown in the section of the board,are V-shaped, and j with the greatest diameter at the center of the board, while in Fig. III the sides are also V- shaped, but the greatest diameter is nearer to one surface than to the other. In Fig. IV the sides of the holes are curved, and in Fig. V one side of the hole is straight from one surface to the other and the other side is V-shaped. I

the board can be effective as means for holding the exterior plaster in place.

I do not claim, broadly, perforated boards as a backing for plaster, but

What I do claim as my invention is- As an improved article of manufacture, a backing for plaster, consisting of wood boards having holes entirely through them of greater diameter or size in the interior of the board than at-the surfaces, substantially as and for the purpose set forth.

' JOHN LYLE CLARKE.

Witnesses:

JNo. T. MADDOX, WM. T. HOWARD.- 

